ESP32 - Rain Sensor - LED
We are going to learn how to program ESP32 to turn on the LED if the rain is detected.
Hardware Used In This Tutorial
1 | × | ESP-WROOM-32 Dev Module | |
1 | × | USB Cable Type-C | |
1 | × | Rain Sensor | |
1 | × | LED | |
1 | × | 220 ohm resistor | |
1 | × | Breadboard | |
1 | × | Jumper Wires | |
1 | × | (Recommended) Screw Terminal Expansion Board for ESP32 |
Or you can buy the following sensor kits:
1 | × | DIYables Sensor Kit (30 sensors/displays) | |
1 | × | DIYables Sensor Kit (18 sensors/displays) |
Introduction to LED and Rain Sensor
Unfamiliar with led and rain sensor, including their pinouts, functionality, and programming? Explore comprehensive tutorials on these topics below:
Wiring Diagram
This image is created using Fritzing. Click to enlarge image
If you're unfamiliar with how to supply power to the ESP32 and other components, you can find guidance in the following tutorial: How to Power ESP32.
ESP32 Code
Quick Instructions
- If this is the first time you use ESP32, see how to setup environment for ESP32 on Arduino IDE.
- Do the wiring as above image.
- Connect the ESP32 board to your PC via a micro USB cable
- Open Arduino IDE on your PC.
- Select the right ESP32 board (e.g. ESP32 Dev Module) and COM port.
- Connect ESP32 to PC via USB cable
- Open Arduino IDE, select the right board and port
- Copy the above code and open with Arduino IDE
- Click Upload button on Arduino IDE to upload code to ESP32
- Move your hand in front of sensor
- See the change of LED's state
Code Explanation
Read the line-by-line explanation in comment lines of source code!
Video Tutorial
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